MinesTMM operatorsShift supervisorsEngineering

TMM Pre-Use Checklist (Trackless Mobile Machinery): Go, Go-But, No-Go

A pre-use check for trackless mobile machinery (LHDs, dump trucks, drill rigs, utility vehicles and the other TMMs on a mine) that the operator completes before moving the machine. A no-go defect stops the machine until it is repaired; a go-but defect lets it work while the defect is repaired within the time your code of practice sets.

At the start of every shift, before the machine moves · 19 checks · free printable PDF

Legal basis checked 26 October 2026

Aerial view of dump trucks, excavators, a dozer and a screening plant on an earthworks site

What the checklist covers

Operator and machine records

Operator licensed and authorised in writing for this machine type; licence carried
No-go and go-but defects from the previous check repaired and signed off

No-go items: any defect and the machine may not be moved

Service brake works and the park brake holds (functional test as your procedure sets)
Steering works with no excessive free play
Collision prevention or proximity detection passes its self-test and warnsPhoto
Horn, reverse alarm, lights and beacon working
Seat belt working
Fire suppression system armed; extinguisher within its service datePhoto
ROPS and FOPS intact
Wheels, rims and tyres: all nuts present, no cuts, bulges or damaged rimsPhoto
Emergency stop works
No major fuel, oil, hydraulic or coolant leaksPhoto

Go-but items: record and repair within the set time

Mirrors and cameras clean, intact and adjusted
Cab glass, seat and controls in good condition
Engine oil, coolant and hydraulic oil levels correct
Minor leaks or seepage recorded
New body damage recordedPhoto

Result

Decision recorded: go, go-but (defect logged with a repair date) or no-go (machine may not be moved)
Check verified by the supervisor

How to use this checklist

1Do the check at the start of the shift, before the machine moves, and whenever you take over a machine.
2Work through the no-go items first. Any no-go defect: do not move the machine; report it and tag it out.
3Record go-but defects with the date they must be repaired by, as your code of practice sets.
4Photograph every defect and the items marked PHOTO.
5Sign the checklist, have your supervisor verify it, and keep completed checklists for at least three months.

A general guide. Add your manufacturer's checks and your site's own standards, and follow your site's procedures for reporting and isolating defective equipment. Regulation 8.10.24 of the Mine Health and Safety Act regulations requires the operator to inspect the brakes, lights and other safety features before moving a trackless mobile machine, and to complete a pre-use checklist at the start of each shift that states when the machine may or may not be moved. Brakes are tested routinely under 8.10.7, operators are licensed under 8.10.23 and carry the licence under 8.10.27, and collision prevention is required under 8.10.1 and 8.10.2. The guideline for the TMM code of practice (Notice 855 of 2015, Part C 8.10) sets the go, go-but and no-go conditions and keeping completed checklists for at least three months.

Legal basis checked on 26 October 2026 against: Mine Health and Safety Act regulations, regulations 8.10.1, 8.10.2, 8.10.7, 8.10.23, 8.10.24 and 8.10.27; Guideline for the TMM code of practice (Notice 855 of 2015), Part C 8.10.

Convert this checklist into a digital form

Run it on an Android phone with no signal, attach photos as evidence, and every failed item raises an issue with an owner and a due date.

Start the trial from here and this checklist is waiting in your workspace as a ready-made form.

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Paper finds the defect. Then what?

On paper, a ticked "Defect" box often stays a ticked box. In Inspecable the same checklist keeps going after it is signed:

Run the checklist on an Android phone with no signal; it syncs when the crew is back in range.
A failed item raises an issue with an owner and a due date.
A corrective action cannot close without evidence and a signature.
Every completed inspection produces a signed PDF with its photos.

Questions

What is a TMM pre-use checklist?

The check a trackless mobile machine operator must complete at the start of each shift before moving the machine, under regulation 8.10.24 of the MHSA regulations. It must state when the machine may or may not be moved, which is why it is split into no-go and go-but items.

What is the difference between go-but and no-go?

A no-go defect, such as faulty brakes, steering or collision prevention, means the machine may not be moved until it is repaired. A go-but defect, such as a damaged mirror, lets the machine work while the defect is repaired within the time your code of practice sets.

How long must TMM pre-use checklists be kept?

At least three months, under the guideline for the TMM mandatory code of practice (Notice 855 of 2015). Keep them with the machine history so that a repeat defect on the same machine shows up.

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